Abstract:We employ the UrQMD transport + hydrodynamics hybrid model to estimate the
effects of a separation of the hot equilibrated core and the dilute corona
created in high energy heavy ion collisions. It is shown that the fraction of
the system which can be regarded as an equilibrated fireball changes over a
wide range of energies. This has an impact especially on strange particle
abundancies. We show that such a core corona separation allows to improve the
description of strange particle ratios and flow as a functi… Show more
“…The SU(3) flavor parity doublet quark-hadron chiral mean field model (CMF model) [7,8,9] is a unified description of the statistical and thermodynamical properties of QCD matter. The complete description of QCD bulk properties includes a complete list of known hadrons (with masses below 2.6 GeV) as well as the three light quark flavors.…”
A unified chiral mean field approach is presented for QCD thermodynamics in a wide range of temperatures and densities. The model simultaneously gives a satisfactory description of lattice QCD thermodynamics and fulfills nuclear matter and astrophysical constraints. The resulting equation of state can be incorporated in relativistic fluid-dynamical simulations of heavy-ion collisions and neutron stars mergers. Access to different regions of the QCD phase diagram can be obtained in simulations of heavy-ion data and observations of neutron star mergers.
“…The SU(3) flavor parity doublet quark-hadron chiral mean field model (CMF model) [7,8,9] is a unified description of the statistical and thermodynamical properties of QCD matter. The complete description of QCD bulk properties includes a complete list of known hadrons (with masses below 2.6 GeV) as well as the three light quark flavors.…”
A unified chiral mean field approach is presented for QCD thermodynamics in a wide range of temperatures and densities. The model simultaneously gives a satisfactory description of lattice QCD thermodynamics and fulfills nuclear matter and astrophysical constraints. The resulting equation of state can be incorporated in relativistic fluid-dynamical simulations of heavy-ion collisions and neutron stars mergers. Access to different regions of the QCD phase diagram can be obtained in simulations of heavy-ion data and observations of neutron star mergers.
“…Our key observation is that while velocity field represent the "little bang" picture, vorticity field form the relatively thin toroidal "tire-like" structures (figure 3), which emerge in the layer (where velocity field changes rapidly) separating the "core" and "corona" regions [11,12] and form the sort of vortex sheet [13].…”
Section: Large-scale Structures Of Vorticity Fieldsmentioning
Abstract. We study the structure of vorticity and hydrodynamic helicity fields in peripheral heavy-ion collisions using the kinetic Quark-Gluon Strings Model. The angular momentum which is a source of P-odd observables is preserved within this model with a good accuracy. We observe the formation of specific toroidal structures of vorticity field. Their existence is mirrored in the polarization of hyperons of the percent order. The observed qualitative energy dependence of polarization was predicted earlier and is quantified now.
“…For more discussion we refer the reader to [25,27]. With the improved integrated Boltzmann + hydrodynamics hybrid approach [14,18,30,31], where various EoS of nuclear matter during the hydrodynamic evolution may be treated consistently and a decoupling supplemented by realistic 3d hypersurfaces we hope to get a satisfactory solution in the near future.…”
are also compared to data from the STAR experiment at RHIC. For both energies we find that the calculated R O /R S ratio is always larger than data, indicating that the emission in the model is less explosive than observed in the data.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.